Headphone



FIG. 1 is a perspective view of a headphone showing our new design, the opposite perspective view is a mirror image;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines showing the environment in the Figures are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a headphone, as shown and described. 